The Iron Rose is my favorite, I'm still working my way through the rest. I really like the opening of Requiem for a Vampire... Jean Rollin is def an acquired taste, try to think of his stuff as "Antonioni Horror", they're all atmosphere...maybe look at some screencaps on blu-ray.com (note: those aren't all Rollin titles, but all of the Redemption releases) and if you like the visual style based on them you might like the movie...

Start with The Iron Rose if you haven't seen that yet.

I love that bit in the trailer after the 2:15 mark with her dancing.

Excerpts from an extended post Jeremy Richey made over at The Moon in the Gutter:"Perhaps no other major production in Jean Rollin's career has divided fans more than 1973's La Rose de fer. The film, known alternately as The Iron Rose and as The Crystal Rose, is seen by some as one of Rollin's greatest achievements, a haunting poetic production that shows the director at his minimal best, while others, turned off by Rollin's abandoning of his usual Vampiric elements, find the film a failure, and at best a bore. Regardless of one's opinion of the work, two things are for certain, The Iron Rose is one of Jean Rollin's most personal projects, and its failure in 1973 changed the direction of his career drastically.

[...]

The Iron Rose is among the most minimal modern films one could possibly imagine. Outside of an opening party sequence and a few scattered one scene appearances throughout the work, the film only features two characters. The storyline, centering on two young lovers finding themselves lost in a huge expansive old cemetery, is so spare that it is nearly non-existent. In his introduction to the film in Virgins and Vampires Rollin admitted that what interested him about the film was the notion of, "a woman's dramatic self-destruction", and that ultimately it was, "a dark and desperate film." Less a successful modern narrative film and more of a poignant tragic poetic work more akin to silent cinema, The Iron Rose is a remarkable work that grows more and more resonate with each passing year. Like Lou Reed's Berlin, that also came out in 1973, The Iron Rose is a work made by an artist not looking to satisfy the time it is in, but is instead looking to transcend it."